France has been driven so "mad" by British cycling success that they are resorting to questioning the team's honesty, David Cameron said today.

The Prime Minister said the French had found the sight of the Champs Elysee covered in Union Jacks to greet Bradley Wiggins' Tour de France victory "a bit hard to take".

And with riders and coaches raising questions about the legality of Team GB's bikes, he said one French media outlet he was interviewed by "virtually accused us of cheating".

Just over a week ago, Mr Cameron was forced to suffer a ribbing by French president Francois Hollande about the relative performances of their two countries at that point.

Mr Hollande jokingly thanked Britain for "rolling out the red carpet" for French athletes to win medals - after joining the PM to watch his country play handball.

But the tables have been dramatically turned since then, with France now having only eight gold medals so far to Great Britain's 22 - and 20 fewer of all colours.

The velodrome has proved a particular cauldron for cross-channel rivalry, British domination of the podium sparking irate suggestions of foul play.

But Mr Cameron, in an interview with Chris Evans on BBC Radio 2, suggested their frustration was a sign of just how well the British system was working.

"We've got a system that seems to be delivering. It's driving the French mad," he said.

"I did an interview with French television yesterday and they virtually accused us of cheating. I think they found the Union Jacks on the Champs Elysee a bit hard to take.

"We have got a great system so let's build on that and then when we go to Rio in 2016 we can have a good experience."

The premier also picked Mo Farah's victory in the 10,000 metres as his stand-out moment from the Games so far.

Mr Cameron, who was in the stadium on "Super Saturday" when Team GB won three gold medals in track and field, said: "When I think of the most moving moment for me on that Saturday night, there he was, this sort of slightly lonely figure with the team of Ethiopians and the team of Kenyans chasing him down and trying to stretch him out by having these short bursts of pace and he just kept plugging away and that last lap was just unbelievably emotional and exciting."